Mérgulo Californiano Aliclaro vs Mérgulo de Isla Guadalupe

Scripps's Murrelet and Guadalupe Murrelet are closely related seabirds that can be challenging to distinguish. The most reliable field mark is the extent of white on the face: Guadalupe Murrelet has white that extends up in front of, and often over, the eye, while Scripps's Murrelet lacks this feature.

1. Check the face pattern: Look for white extending in front of and over the eye in Guadalupe Murrelet. 2. Use binoculars to focus on facial markings: This is the most reliable way to distinguish these species in the field.

Guadalupe Murrelet has white that extends up in front of, and often over, the eye, which is not seen in Scripps's Murrelet.